Monday, August 17, 2015

MoneyScience News

MoneyScience News

Published / Preprint: First Passage Time Properties for Time-varying Diffusion Models: A Martingale Approach. (arXiv:1508.03373v1 [math.PR])

Posted: 16 Aug 2015 05:36 PM PDT

In this work, we use Martingale theory to derive formulas for the expected decision time, error rates, and first passage times associated with a multistage drift diffusion model, or a Wiener diffusion model with piecewise constant time-varying drift rates and decision boundaries. The model we study is a generalization of that considered in Ratcliff (1980). The derivation relies on using the...

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Published / Preprint: Detecting the bipartite World Trade Web evolution across 2007: a motifs-based analysis. (arXiv:1508.03533v1 [physics.soc-ph])

Posted: 16 Aug 2015 05:36 PM PDT

In the present paper we employ the theoretical tools developed in network theory, in order to shed light on the response of world wide trade to the financial crisis of 2007. In particular, we have explored the evolution of the bipartite country-product World Trade Web across the years 1995-2010, monitoring the behaviour of the system both before and after 2007. Remarkably, our results indicate...

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Published / Preprint: From innovation to diversification: a simple competitive model. (arXiv:1508.03571v1 [physics.soc-ph])

Posted: 16 Aug 2015 05:36 PM PDT

Few attempts have been proposed in order to describe the statistical features and historical evolution of the export bipartite matrix countries/products. An important standpoint is the introduction of a products network, namely a hierarchical forest of products that models the formation and the evolution of commodities. In the present article, we propose a simple dynamical model where countries...

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